使用FlatList和动画- React Native向下滚动标题

import React, { useRef } from 'react';
import { View, FlatList, Animated } from 'react-native';

const titles = [
  { id: 1, title: '标题1' },
  { id: 2, title: '标题2' },
  { id: 3, title: '标题3' },
  // 其他标题...
];

const scrollY = useRef(new Animated.Value(0)).current;

const renderTitle = ({ item }) => {
  return (
    <Animated.Text
      style={{
        fontSize: 24,
        fontWeight: 'bold',
        opacity: scrollY.interpolate({
          inputRange: [(item.id - 1) * 100, item.id * 100],
          outputRange: [1, 0.5],
          extrapolate: 'clamp',
        }),
      }}
    >
      {item.title}
    </Animated.Text>
  );
};

const App = () => {
  return (
    <View style={{ flex: 1 }}>
      <Animated.View
        style={{
          position: 'absolute',
          top: 0,
          left: 0,
          right: 0,
          height: 100,
          backgroundColor: 'white',
          zIndex: 1,
          opacity: scrollY.interpolate({
            inputRange: [0, 100],
            outputRange: [1, 0],
            extrapolate: 'clamp',
          }),
        }}
      />
      <FlatList
        data={titles}
        renderItem={renderTitle}
        keyExtractor={(item) => item.id.toString()}
        onScroll={Animated.event(
          [{ nativeEvent: { contentOffset: { y: scrollY } } }],
          { useNativeDriver: true }
        )}
      />
    </View>
  );
};